Temperature-dependent self-trapped exciton emission in Cu(I) doped zinc-based metal halides from well-resolved excited state structures  

作　　者：Yunlong Bai Shuai Zhang Nengneng Luo Bingsuo Zou Ruosheng Zeng 

机构地区：[1]State Key Laboratory of Featured Metal Materials and Life-cycle Safety for Composite Structures,School of Physical Science and Technology,Guangxi University,Nanning 530004,China

出　　处：《Nano Research》2024年第8期7768-7775,共8页纳米研究（英文版）

基　　金：supported by the National Natural Science Foundation of China(Nos.22175043 and 52162021);Guangxi Science and Technology Plan Project(No.Guike AA23073018);supported by the high-performance computing platform of Guangxi University。

摘　　要：Zero-dimensional metal halides are of unique structures and tunable photoluminescence properties,showing great potential applications such as light-emitting diodes(LEDs)and sensing.Herein,we successfully synthesized Cu^(+)doped(MA)_(2)ZnCl_(4)metal halides by a slow evaporation solvent method.The introduction of Cu^(+)results in sky-blue self-trapped exciton emission in(MA)_(2)ZnCl_(4) at 486 nm at room temperature,and a photoluminescence quantum yield is as high as 54.9%.Interestingly,at low temperatures,Cu^(+)-doped(MA)_(2)ZnCl_(4) exhibits two emission peaks located at 482 and 605 nm,respectively.This temperaturedependent dual emission indicates two excited state structures that exist on the triplet excited-state potential energy surface.In addition,the temperature sensor we fitted has good performance(Sr=1.65%·K^(−1)),which is the first attempt in Cu^(+) doped Znbased metal halides.Our work enriches the family of sky-blue metal halides and provides a promising strategy for building skyblue LEDs.

关 键 词：sky-blue emission self-trapped exciton metal halides excited state structures temperature sensor 

分 类 号：TN36[电子电信—物理电子学]